W ith decades in the business, Marble America (517 and 535 5th Ave, New Rochelle, 914-632-3110/914-740-3487; 309 N Bedford Rd, Mount Kisco 914-242-0484) knows marble—and more. And you can see it all in the company’s spanking new three-story showroom (535 5th Ave): classic styles of marble and granite along with a vast array of new innovative designs, including a great collection of tiles and mosaics. And if, somehow, you don’t find what you’re looking for, simply place a custom order